Far away, he saw a huge crane. In the steel structure of the construction site supervision engineer Chen Hongyou said, rainbow expressway interchanges project, just entered the stage of steel box girder hoisting, the crane capable of lifting 650 tons, is currently the largest in zhejiang province. The first steel box girder that was installed just a few days ago is its credit.
The first steel box girder, 45 meters long and 2.2 meters high, weighs 196 tons. Such a monster, with a 650-ton crane, a 450-ton crane, a single hoist, twin lift, without effort to lift up.
On July 1, the second steel box girder will be installed with a larger size, 50 meters long and 207 tons. A total of 13 steel box girders will be installed in the rainbow express interchange, like the one I saw yesterday, about 60, with nearly 8,000 tons added. In early October, all installed.
By December 31, the rainbow express is expected to be open to traffic. At that time, the five-storey, 33-meter-high level, equivalent to 10 floors of communication, is "the tallest city overpass in east China".